“And if you gaze long into an abyss, the abyss gazes also into thee ”: four morphs of Arctic charr adapting to a depth gradient in Lake Tinnsjøen
The origin of species is a central topic in biology. Ecological speciation might be a driver in adaptive radiation, providing a framework for understanding mechanisms, level, and rate of diversification. The Arctic charr Salvelinus alpinus L. is a polymorphic species with huge morphological and life...
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Online Access: | https://hdl.handle.net/11250/3018485 https://doi.org/10.1111/eva.12983 |
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fthsinnlandet:oai:brage.inn.no:11250/3018485 2024-03-03T08:40:18+00:00 “And if you gaze long into an abyss, the abyss gazes also into thee ”: four morphs of Arctic charr adapting to a depth gradient in Lake Tinnsjøen Østbye, Kjartan Hassve, Marius Hagen Tamayo, Ana-Maria Peris Hagenlund, Mari Vogler, Thomas Præbel, Kim Norway 2020 application/pdf https://hdl.handle.net/11250/3018485 https://doi.org/10.1111/eva.12983 eng eng urn:issn:1752-4571 https://hdl.handle.net/11250/3018485 https://doi.org/10.1111/eva.12983 cristin:1818559 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no 1240-1261 13 Evolutionary Applications adaptive radiation ecological speciation microsatellites morphs mtDNA natural selection niche specialization Pleistocene ice age population divergence Salvelinus alpinus VDP::Matematikk og Naturvitenskap: 400 Peer reviewed Journal article 2020 fthsinnlandet https://doi.org/10.1111/eva.12983 2024-02-02T12:42:08Z The origin of species is a central topic in biology. Ecological speciation might be a driver in adaptive radiation, providing a framework for understanding mechanisms, level, and rate of diversification. The Arctic charr Salvelinus alpinus L. is a polymorphic species with huge morphological and life-history diversity in Holarctic water systems. We studied adaptive radiation of Arctic charr in the 460-m-deep Lake Tinnsjøen to (a) document eco-morphology and life-history traits of morphs, (b) estimate reproductive isolation of morphs, and (c) illuminate Holarctic phylogeography and lineages colonizing Lake Tinnsjøen. We compared Lake Tinnsjøen with four Norwegian outgroup populations. Four field-assigned morphs were identified in Lake Tinnsjøen: the planktivore morph in all habitats except deep profundal, the dwarf morph in shallow-moderate profundal, the piscivore morph mainly in shallow-moderate profundal, and a new undescribed abyssal morph in the deep profundal. Morphs displayed extensive life-history variation in age and size. A moderate-to-high concordance was observed among morphs and four genetic clusters from microsatellites. mtDNA suggested two minor endemic clades in Lake Tinnsjøen originating from one widespread colonizing clade in the Holarctic. All morphs were genetically differentiated at microsatellites (FST: 0.12–0.20), associated with different mtDNA clade frequencies. Analyses of outgroup lakes implied colonization from a river below Lake Tinnsjøen. Our findings suggest postglacial adaptive radiation of one colonizing mtDNA lineage with niche specialization along a depth–temperature–productivity–pressure gradient. Concordance between reproductive isolation and habitats of morphs implies ecological speciation as a mechanism. Particularly novel is the extensive morph diversification with depth into the often-unexplored deepwater profundal habitat, suggesting we may have systematically underestimated biodiversity in lakes. The origin of species is a central topic in biology. Ecological speciation ... Article in Journal/Newspaper Arctic charr Arctic Salvelinus alpinus Høgskolen i Innlandet: Brage INN Arctic Norway Evolutionary Applications 13 6 1240 1261 |
institution |
Open Polar |
collection |
Høgskolen i Innlandet: Brage INN |
op_collection_id |
fthsinnlandet |
language |
English |
topic |
adaptive radiation ecological speciation microsatellites morphs mtDNA natural selection niche specialization Pleistocene ice age population divergence Salvelinus alpinus VDP::Matematikk og Naturvitenskap: 400 |
spellingShingle |
adaptive radiation ecological speciation microsatellites morphs mtDNA natural selection niche specialization Pleistocene ice age population divergence Salvelinus alpinus VDP::Matematikk og Naturvitenskap: 400 Østbye, Kjartan Hassve, Marius Hagen Tamayo, Ana-Maria Peris Hagenlund, Mari Vogler, Thomas Præbel, Kim “And if you gaze long into an abyss, the abyss gazes also into thee ”: four morphs of Arctic charr adapting to a depth gradient in Lake Tinnsjøen |
topic_facet |
adaptive radiation ecological speciation microsatellites morphs mtDNA natural selection niche specialization Pleistocene ice age population divergence Salvelinus alpinus VDP::Matematikk og Naturvitenskap: 400 |
description |
The origin of species is a central topic in biology. Ecological speciation might be a driver in adaptive radiation, providing a framework for understanding mechanisms, level, and rate of diversification. The Arctic charr Salvelinus alpinus L. is a polymorphic species with huge morphological and life-history diversity in Holarctic water systems. We studied adaptive radiation of Arctic charr in the 460-m-deep Lake Tinnsjøen to (a) document eco-morphology and life-history traits of morphs, (b) estimate reproductive isolation of morphs, and (c) illuminate Holarctic phylogeography and lineages colonizing Lake Tinnsjøen. We compared Lake Tinnsjøen with four Norwegian outgroup populations. Four field-assigned morphs were identified in Lake Tinnsjøen: the planktivore morph in all habitats except deep profundal, the dwarf morph in shallow-moderate profundal, the piscivore morph mainly in shallow-moderate profundal, and a new undescribed abyssal morph in the deep profundal. Morphs displayed extensive life-history variation in age and size. A moderate-to-high concordance was observed among morphs and four genetic clusters from microsatellites. mtDNA suggested two minor endemic clades in Lake Tinnsjøen originating from one widespread colonizing clade in the Holarctic. All morphs were genetically differentiated at microsatellites (FST: 0.12–0.20), associated with different mtDNA clade frequencies. Analyses of outgroup lakes implied colonization from a river below Lake Tinnsjøen. Our findings suggest postglacial adaptive radiation of one colonizing mtDNA lineage with niche specialization along a depth–temperature–productivity–pressure gradient. Concordance between reproductive isolation and habitats of morphs implies ecological speciation as a mechanism. Particularly novel is the extensive morph diversification with depth into the often-unexplored deepwater profundal habitat, suggesting we may have systematically underestimated biodiversity in lakes. The origin of species is a central topic in biology. Ecological speciation ... |
format |
Article in Journal/Newspaper |
author |
Østbye, Kjartan Hassve, Marius Hagen Tamayo, Ana-Maria Peris Hagenlund, Mari Vogler, Thomas Præbel, Kim |
author_facet |
Østbye, Kjartan Hassve, Marius Hagen Tamayo, Ana-Maria Peris Hagenlund, Mari Vogler, Thomas Præbel, Kim |
author_sort |
Østbye, Kjartan |
title |
“And if you gaze long into an abyss, the abyss gazes also into thee ”: four morphs of Arctic charr adapting to a depth gradient in Lake Tinnsjøen |
title_short |
“And if you gaze long into an abyss, the abyss gazes also into thee ”: four morphs of Arctic charr adapting to a depth gradient in Lake Tinnsjøen |
title_full |
“And if you gaze long into an abyss, the abyss gazes also into thee ”: four morphs of Arctic charr adapting to a depth gradient in Lake Tinnsjøen |
title_fullStr |
“And if you gaze long into an abyss, the abyss gazes also into thee ”: four morphs of Arctic charr adapting to a depth gradient in Lake Tinnsjøen |
title_full_unstemmed |
“And if you gaze long into an abyss, the abyss gazes also into thee ”: four morphs of Arctic charr adapting to a depth gradient in Lake Tinnsjøen |
title_sort |
“and if you gaze long into an abyss, the abyss gazes also into thee ”: four morphs of arctic charr adapting to a depth gradient in lake tinnsjøen |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/3018485 https://doi.org/10.1111/eva.12983 |
op_coverage |
Norway |
geographic |
Arctic Norway |
geographic_facet |
Arctic Norway |
genre |
Arctic charr Arctic Salvelinus alpinus |
genre_facet |
Arctic charr Arctic Salvelinus alpinus |
op_source |
1240-1261 13 Evolutionary Applications |
op_relation |
urn:issn:1752-4571 https://hdl.handle.net/11250/3018485 https://doi.org/10.1111/eva.12983 cristin:1818559 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no |
op_doi |
https://doi.org/10.1111/eva.12983 |
container_title |
Evolutionary Applications |
container_volume |
13 |
container_issue |
6 |
container_start_page |
1240 |
op_container_end_page |
1261 |
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1792496034425864192 |